Fertilisation & Gamete Production in Plants Biology Revision Slides - WJEC BY5 Sexual reproduction in plants

Fertilisation & Gamete Production in Plants Biology Revision Slides - WJEC BY5 Sexual reproduction in plants

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Biology Revision Presentation


Gamete Production in plants

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The male gamete
of the plant is
within the
pollen grain.

Page 3

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The pollen grain is
formed in the anther
where meiosis takes
place to form
haploid pollen grains.

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The pollen grain itself
consists of a tough outer
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wall , a generative
nucleus and a pollen tube
nucleus.

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which makes it resistant to desiccation.

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When the pollen grains are mature
the anther dries out.

Shortly after this dehiscence occurs - the
pollen sacs curl away from the pollen
grains releasing them.

These are then carried away either by
the wind or by insects or through one of
the other pollination mechanisms.

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The female gamete
is the egg nucleus
and is situated
within the
ovule.

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To form the ovule a mother cell
undergoes meiosis.

This produces a
haploid embryo sac with
8 nuclei formed in mitosis.

The ovule itself is
contained within the ovary.

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Biology Revision Presentation


Fertilisation

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Fertilisation is the
process by which
the male and
female gametes
fuse.

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Fertilisation
produces a zygote.

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